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ഒരു മണിക്കൂറിനുള്ളിൽ, ഒരു ബോട്ട് അരുവിയിലൂടെ ഒഴുക്കിന് അനുകൂലമായി മണിക്കൂറിൽ 11 കിലോമീറ്ററും, ഒഴുക്കിനെതിരെ മണിക്കൂറിൽ 5 കിലോമീറ്ററും സഞ്ചരിക്കുന്നു. നിശ്ചല ജലത്തിൽ ബോട്ടിന്റെ വേഗത (കിലോമീറ്റർ/മണിക്കൂറിൽ) എത്രയാണ് ?

A3 km/hr

B5 km/hr

C8 km/hr

D9 km/hr

Answer:

C. 8 km/hr

Read Explanation:

നിശ്ചല ജലത്തിൽ ബോട്ടിന്റെ വേഗത =1/2(ഒഴുക്കിന് അനുകൂലമായ വേഗത + ഒഴുക്കിനെതിരെ വേഗത) =1/2(5+11) =16/2 =8km/hr

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